we begin this morning with high alert. the obama administration is prasing for another day of demonstrations in the muslim world after the weekly prayers. meanwhile, the development into the consulate killings in libya. tracie potts has the late e from washington. good morning. >> reporter: mara, good morning. there have been arrests in the killing. our consulate workers have been evacuated to tripoli. there, there are only emergency staff working as there are fears today across the pond and here about more violence in the region. more demonstrations overnight, more tear gas, more rocks thrown at police. so far, more than 200 have been injured in a protest. despite a call for calm by egypt's president, there's concern of more violence.